Planookaph co



M. B. LEVIN.

LOOM ATTACHMENT FOR OUTLET BOXES. APPLICATION FILED 0cT.9. 1918.

1 ,3 1 0,75 8 Patented July 22, 1919.

F? 2.. F7 Z51 WITNESS INVENTOR ZQAMK3. hn/W 'Y Cat/M3 3%- I ATTORNEYS MATILnA B. LEVIN, or SAN FRANCISCO, CALIFORNIA.

, LOOM ATTACHMENT FOR OUTLET-BOXES.

Application filed October 9, 1918; Serial No. 251429.

To all whom it may concern:

Be it known that I, MATILDA BLIWIN, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Loom Attachments for Outlet-Boxes, of which the following is a specification. i

The hereinafter described invention is' designed for-use in connection with electrical installation in buildings generally and vided with a plurality of loom openings, depending on the electrical connections to befor the securing of the loom within the outlet'boxes of such installation in such a manner as to prevent the ready displacement thereof after having been applied to the said boxes.

As well known, the outletboxes are promade through the use of said boxes. These loom boxes as placed on the market by the manufacturer thereofare usually provided with a series of removable disks which cover the loom openin s, and are so heldin place as to be easily knocked out of the loom loosely held within thebox afterthe placing thereof in proper position within the wall structure of a building, with the result that 1 they'are easily removed, become displaced or separated from the boxes and are lost. Efl ortshave been made to overcome this objection by providingthe outlet boxes with loom openlngs having a plurality of de- .pressible tongues which are designed to press onto the outer'surface of the 100m as forced.- therethrough and hold the same againstoutward movement on an effort beingmade to withdraw the loom. This type of outlet box while partially serving to overcome the. dilficulty to the extent of prevent- :ing the withdrawal of theloom on a pulling 7 strain being placed thereon in one direction,

does not wholly solve the problem and besides'is objectionable due to its expense ofmanufacture andthe liability of the loom securing tongues being -mut ilated and rendered useless by reason of the hard usage to which they are subjected during 'handling. -The object of the present invention is to provide a simple, eflicient and inexpensive Specification of Letters Patent.

Patented July 22, 1919.

attachment for the holding of thejloom securely positioned within a loom opening of an outlet box, and one which is capable of being applied to the loom as thesame-is about to be inserted within the loom opening of theoutlet boxand of such a construction as to act in the manner of a lever adapted to move with *the loom within the loom opening as pressure is applied on the loom to force the same withinthe opening at an incline to the-horizontal, until the edge of the 100m opening has passed withina transverse groove formed in theattachment, at which time the same springs outwardly due to "the resiliency of the material out of which the 100111 is formed so as to engage the edge of the loom opening within said groove and thereby hold the attachment firmly in place and the loom in place by reason of the wedge action of the attachment and by so doing holding the 100m against displacement.

To comprehend the invention, reference should be had tothe accompanying sheet of drawings, wherein, p I

Figurel is a broken part sectional side elevation ofa loom box illustrating the loom secured within one of the box.

the loom openings of V Fig; 2 is a detailed sectional view, illustrating the loom with the loom holder about applied to 'the loom opening of the box. I

Fig. 3 is a view similar toFig. 2 ofthe drawingsillustrating the loom and attachv ment positioned within the loom opening of the box.

Fig. i is a longitudinal sectional view of the loom attachment taken on the line X-X, Fig. 50f the drawings, and viewed in the direction of the arrows.

Fig. 5 is a transverse sectional view of the attachment taken on the line Y Y, Fig. 4: of the drawings and viewed in the direction of the arrows/ A I In the drawings, the 'numeral l is used. to designate an ordinary outlet box, 2, one of the loom openings thereof, and 3 the loom for the outlet box. The attachingmeans for the outlet box comprises an elongated cupshaped shell 4, which is provided on its upper surface with a transverse groove The side walls of the cup-shaped shell 4 are substantially: straight as indicated by the "numeral 6, while the forward and rearend .faces as, the attachment with a loom is :fOrced inwardly-within a loom opening, one a pertion of the edge surfaces ofthe loom opening 3, riding over one of the inclined surfaces ,8 of the attachment as the same is fmoved within the loom opening together with the R loom tobe secured therein. As the attachment with the loom is forced into the loom openingthere is a gradual downward pressing of the shellrelativeto the surface of the loom, a which causes; the edge surfaces and more i-particularly the concavedend surfaces thereof to bite or be depressed .within the a surface of the loom, in order to provide a clearance space for the attachment .with the loom to enter under the forcing strain within the loom opening-until the highest point of the inclined surface of the attachment is carried beyond the edge of the loom open- .ing, when, owing to the resiliency of the loom material there is a slight outward give which causes the edge of the loom opening to fit within the transverse groove 5 of the loom-attachment. It will be understood that thedi a meter of the loom isslightly less than the diameterof the loom opening,but of greater diameter than the loom open ng whenrtheloomattachment is; applied therea to, with the result, that in order to pass the loom attachment with the loom into the loom opening of-necessity there must be a I compression of the loom, and such loom is maintained under compression after theedge of the loom opening is seated within the transverse retaining groove 5- of the loom I attachment. 7

In carrying out the invention, the loom attachment is first applied to the surface of the loom and heldthereto by hand pressure ata point adjacentthe end thereof to be inserted within the loom opening, and the loom with the attachment held thereto partly forcedwithin the loom opening while v.heldat slight inclination to the horizontal, as disclosed by Fig. 2 of the drawings. This places a portion of "the inclined end surfaceofthe attachment within the loom open- .Asthus positioned, an inward forcing strain is applied to the loom while the same-is gradually brought to a vertical position, which serves to gradually wedge the attac hment downwardly within the loom open ng until one edge thereof passes the highest point of the inclined surface and seats within the transverse retaining groove i 5, whenthe resiliency of the .looin material forces the attachment outwardly laterally,

Fig. 3 of the drawings, although, at this time the loom is'held 'under compression by the bite of the attachment therein, and

the loom thus prevented against displacement. e

"By reason of the construction of the'loom attachment,-the loomris held securely within the loom opening of the outlet box under all pulling strain to whichthe same is usually subjected and thereby prevented V from; displacement and loss after having, been attached within the loomopening oftheoutlet box. Inasmuch'as the attachment is *de. tachable from theloom boX and loom, the same may be applied to the loomat anytime and attached to the outlet'boxwhen'desired, thus avoiding the necessity-ofproviding a special type of outlet boxdesignedforhold+ ing the loom in fixed position and theexpense incident thereto, V The segmental groove 5, .for engaging with the' edge of the loom opening when the loom land attachmentstands in parallel relation within the loomopening, does not extend throughout the width of the attachment but determines a slight distance above the lowerside wall-edgesof the attachment,

this construction being to preserve the.

strength of the material along the sideedges of the attachment so as to prevent'thecollapsing" or transverse breakingof the -attachment when subjected tothe leverage strains in. applying'the same with the-loorn within the loom opening, but, it will zbe understood that the length of the transverse groove needbe-only such as to serve-as aretaining seat for the reception of the edge of theloom opening. Q; q

-Having thus described the invention awhat is claimed as new" and desired to..-be-*protected by Letters Patentis: J

1. As a new article ofmanufacture anattachment for securlng'looms wlthmthe loom openings of outlet boXes,rthe same comprising' a sheet'of metal stamped to form an elongated cup-shapedlshell, provided onits upper surface. with a depressed transverse retalmng groove andhavmg the end-sure;

faces thereof concave to; partly-embrace" the surface of a loom when-applied-thereto,

, 2. As a new article of EmanufacturevaII attachment for 'securingflooins within the loom openings of outlet boXes, -the.same' com? prising a sheet ofmetal stampdto form an elongated cup-shaped shell, provided on its upper surface; with aftransverse retaining seat and adapted to serve as a' wedgelmember for locking the loom w1th11ra--'loom&

opening of an outlet boxg;

3. An attachment for securing. "looms within'the 'loom openings o'f outleuboxes,

the same? comprising 5 asheet; of -lmetal stamped to, form an elongated ecupr'shaped:

shell provided on its upper surface with a name to this specification in the presence of retaining sea'itedapted to engage with the two subscribing Witnesses. inner ed e 0 a 100m 0 enin when a lied thereto iositioned rcle sive $0 a 10031 for MATILDA LEVIN holding the loom under compression Within Witnesses: the loom opening of the outlet box. N. A. ACKER,

In testimony whereof I have signed my D. B. RICHARDS.

copies of this patent may he obtained for five cents each, by addressing the Gommissioner of Patents,

I Washington, D. 0. 

